Optical device
AssigneeNGK Insulators, Ltd.
InventorsAkiyoshi IDE, Yasunori Iwasaki
Life of this patent
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Abstract
An optical device has an optical fiber, an optical demultiplexer having an optical demultiplexing member for demultiplexing a portion of an optical signal beam transmitted through the optical fiber, as a demultiplexed optical signal beam, and guiding the demultiplexed optical signal beam out of the optical fiber, an optical path changer for changing an optical path of the demultiplexed optical signal beam guided out of the optical fiber, a waveguide serving as at least a medium from which the demultiplexed optical signal beam is emitted to the optical path changer, and a filter disposed on a surface of the waveguide. An angle of incidence of the demultiplexed optical signal beam on the filter is equal to or greater than 0.5°.
Claims10
An optical device comprising:
- an optical fiber;
- an optical demultiplexer having an optical demultiplexing member for demultiplexing a portion of an optical signal beam transmitted through said optical fiber, as a demultiplexed optical signal beam, and guiding the demultiplexed optical signal beam out of said optical fiber;
- an optical path changer for changing an optical path of said demultiplexed optical signal beam guided out of said optical fiber;
- a waveguide serving as at least a medium from which said demultiplexed optical signal beam is emitted to said optical path changer;
- and
- a filter disposed on a surface of said waveguide;
- wherein an angle of incidence of said demultiplexed optical signal beam on said filter is equal to or greater than 0.5°.
Dependencies are inferred from the claim text.